Furthermore they have finally found a solution to your problematic endpin felt washers: https://global.fcgrtokyo.com/elements,parts.leather-endpin-cusion.html (https://global.fcgrtokyo.com/elements,parts.leather-endpin-cusion.html)
"This end pin cushion uses 2 mm thick cowhide which is superior in shock absorption to felt.
You can alleviate the impact when dropping a guitars or basses, and can reduce the looseness of the end pin.
It is a reliable end pin cushion which prevents important instruments from trouble.
?Product specifications and appearance may change without notice."